Elderbrock Slingshot Vs Eddie Myers Manifold

[Bursonaw]

The Elderbrock slingshot and Eddie Myers exhaust heated high rise manifold are both being reproduced. Has anyone run either of theses manifolds and I was wondering if there has ever been a comparison on performance and street drivability? I’d like to hear your experience in running either manifold?

Elderbrock Slingshot


Eddie Myers



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[Bored&Stroked]

They're both excellent manifolds - and I've ran both on various engines. What I have NOT done is ever compare the two on the same engine on the dyno. It would be a fun exercise for sure.

My guess is that the Edelbrock is probably a more 'balanced' intake - given the port/runner arrangement, but I must say that my heavily ported EM runs extremely well on my 284 cube stroker motor (with a huge roller cam in it). I've dramatically ported it - top to bottom - and I do appreciate the fact that I can get into the internals of the EM and do a lot of heavy work . . . so that is good.

The Eddy is a lit more constricted as far as full-runner porting - but not bad by any means. In "as-cast" form, I would bet the Slingshot is a better manifold - so consider that in your mix. I do think the EM is the best looking hi-rise two-carb manifold ever made - it is truly a work of HotRod Art!

Here is a link to my engine (with the EM on it) - on a chassis dyno last week. I ran it up to 5600 RPM in third.

https://youtu.be/BIP-62vgtuw

Here is a picture of the engine:

13719494_10153740475862864_8626741441507731759_o copy.jpg

[tomkowal]

I have an original slingshot for sale in the swap meet section...............

[Tim Ayers]

Originally Posted by Bored&Stroked

They're both excellent manifolds - and I've ran both on various engines. What I have NOT done is ever compare the two on the same engine on the dyno. It would be a fun exercise for sure.

My guess is that the Edelbrock is probably a more 'balanced' intake - given the port/runner arrangement, but I must say that my heavily ported EM runs extremely well on my 284 cube stroker motor (with a huge roller cam in it). I've dramatically ported it - top to bottom - and I do appreciate the fact that I can get into the internals of the EM and do a lot of heavy work . . . so that is good.

The Eddy is a lit more constricted as far as full-runner porting - but not bad by any means. In "as-cast" form, I would bet the Slingshot is a better manifold - so consider that in your mix. I do think the EM is the best looking hi-rise two-carb manifold ever made - it is truly a work of HotRod Art!

Here is a link to my engine (with the EM on it) - on a chassis dyno last week. I ran it up to 5600 RPM in third.

https://youtu.be/BIP-62vgtuw

Here is a picture of the engine:

Attachment 363512

Well, how did it do? I couldn't make out the numbers on the computer. Sounds like it's got 1,000 HP!

[Bursonaw]

Originally Posted by Bored&Stroked

They're both excellent manifolds - and I've ran both on various engines. What I have NOT done is ever compare the two on the same engine on the dyno. It would be a fun exercise for sure.



My guess is that the Edelbrock is probably a more 'balanced' intake - given the port/runner arrangement, but I must say that my heavily ported EM runs extremely well on my 284 cube stroker motor (with a huge roller cam in it). I've dramatically ported it - top to bottom - and I do appreciate the fact that I can get into the internals of the EM and do a lot of heavy work . . . so that is good.



The Eddy is a lit more constricted as far as full-runner porting - but not bad by any means. In "as-cast" form, I would bet the Slingshot is a better manifold - so consider that in your mix. I do think the EM is the best looking hi-rise two-carb manifold ever made - it is truly a work of HotRod Art!



Here is a link to my engine (with the EM on it) - on a chassis dyno last week. I ran it up to 5600 RPM in third.



https://youtu.be/BIP-62vgtuw



Here is a picture of the engine:



Attachment 363512

Thanks for the comments. I agree that the EM manifold sure makes a flathead into a work of art. I’m also curious as to how much HP your 32 had to the ground?


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[Bored&Stroked]

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At the rear wheels it was about 150 HP - which equates to about 180 or so at the crank. The engine could really use more carbs or bigger carbs (like a 4-pot manifold), but I'm trying to keep the EM manifold on it and maintain the early 40's style look.

I have a spare EM riser that I'm going to port out and see what a couple of Holley 2110 carbs will do, they supposedly flow about 40 cfm more than the Strombergs that are on it. They may help some, but it is still less than it needs (I used to run 3 of them on a 284 cube engine with a much smaller cam and ports) . . . maybe a couple of 'Big 97's'.

It is a really fun engine just the way it is - so this is just me screwing around. First, I need to put a new rear end in it and get it back on the dang road. It sucks to break stuff in the middle of Summer. LOL

[Tim Ayers]

Originally Posted by Bored&Stroked

At the rear wheels it was about 150 HP - which equates to about 180 or so at the crank. The engine could really use more carbs or bigger carbs (like a 4-pot manifold), but I'm trying to keep the EM manifold on it and maintain the early 40's style look.

I have a spare EM riser that I'm going to port out and see what a couple of Holley 2110 carbs will do, they supposedly flow about 40 cfm more than the Strombergs that are on it. They may help some, but it is still less than it needs (I used to run 3 of them on a 284 cube engine with a much smaller cam and ports) . . . maybe a couple of 'Big 97's'.

It is a really fun engine just the way it is - so this is just me screwing around. First, I need to put a new rear end in it and get it back on the dang road. It sucks to break stuff in the middle of Summer. LOL

Good luck with it! I’m sure it’s a blast. I’m really curious out those Big 97’s as well.

[JSeery]

Originally Posted by Bored&Stroked

First, I need to put a new rear end in it and get it back on the dang road. It sucks to break stuff in the middle of Summer. LOL

I thought breaking stuff was what hot rodding was all about!

[Bursonaw]

Getting back to the original post, anyone have any experience on the Slingshot manifold?


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[Talkwrench]

Yes.. The slingshot on my standard but very healthy 21 stud. Personally for me its a bit of a pain as I drive [almost] daily and it doesn't run well until the engine is up to temperature, at temperature its fine, cold its a pig. So don't cover the heat risers. Performance.. well the bottom end is not as good but you would expect that with twice as much carb as you need, mid - top range its got a bit of punch but it aint 'all that' .. Again personally I cant rave about it.

[Ritzy1]

I went with the Edelbrock. Just putting the finishing touches on the motor before it goes in the car, so I can't tell you how it performs yet.

[HotRodmicky]

EM has exhaust Gases up the runners, the Slingshot doesnt.
Good for cold start , not so good for a hot engine.
You want a cold intake charge ....

I dont think there is a performance difference on a small engine.
EM is better because of the heated runner for daily driving

[Bursonaw]

Thanks to everyone for there posts. Sounds to me that each has there own minor shortcomings. I did go with the Slingshot, mostly for price and that I did not need to change my generator out. Hot Rod magazine did do a nice write up on the Slingshot, but it did not talk about the drivability of the manifold.

I have not run mine on the road as of yet just a test run around the block. Once I finish rebuilding the front axle then hopefully I can put some miles on it then.




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[Ritzy1]

Looks nice! Did you plumb your intake for power brakes like I did?

[Bursonaw]

Originally Posted by Ritzy1

Looks nice! Did you plumb your intake for power brakes like I did?

Thanks, I drilled a port in the intake for the vacuum shift on the Columbia Overdrive.




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[Pete]

I had a high Meyer on a slightly modified 221 once.
I changed to an Idlerbrock Super and thought I had bolted on 4 more cylinders.

[Tim Ayers]

Originally Posted by Pete

I had a high Meyer on a slightly modified 221 once.
I changed to an Idlerbrock Super and thought I had bolted on 4 more cylinders.

Interesting. I've also heard that the Edlebrock Super's are good runners as well. I've got one that came with real nice billet 3" risers as well. According to JWL's flow bench testing, risers seem to help out even mores so.

[5851a]

Originally Posted by Bursonaw

Thanks to everyone for there posts. Sounds to me that each has there own minor shortcomings. I did go with the Slingshot, mostly for price and that I did not need to change my generator out. Hot Rod magazine did do a nice write up on the Slingshot, but it did not talk about the drivability of the manifold.

I have not run mine on the road as of yet just a test run around the block. Once I finish rebuilding the front axle then hopefully I can put some miles on it then.




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Keep a eye on those red fuel lines.

[40 Deluxe]

How about milling up some custom carb spacers with water passages to provide the needed carb heat? Just a few minutes idling would provide some heat to help with fuel vaporization and prevent cylinder wash down (plus get some needed drivability back). For warmer days or longer trips, add a water shut off valve.

[Talkwrench]

Originally Posted by 40 Deluxe

How about milling up some custom carb spacers with water passages to provide the needed carb heat? Just a few minutes idling would provide some heat to help with fuel vaporization and prevent cylinder wash down (plus get some needed drivability back). For warmer days or longer trips, add a water shut off valve.

That's thinkin'...

[JSeery]

Would be better with exhaust heat. Had a VW bug years ago, when the heat riser would plug up the base of the carb would ice up. Didn't matter much on the outside temp. The exhaust ports are already there wanting to be used.

[ford nut]

I bought the re-pop slingshot a couple of months back, but haven't seen it yet. it went up to the builder in fresno. I paid for it though. i hope I like it.

[Pete]

It looks like the "high rise" fad has about run it's course what with them getting the "belly button" tag just like SBC's.
The super 2's, the 3's and the 4's are the new black. It is a 70 year cycle.

[Tinker]

I'd think the eddie would have better flow over the the super by just looking at it. I still run a single carb so... but I'd run a Thickstun twin.

[Tinker]

Originally Posted by JSeery

Would be better with exhaust heat. Had a VW bug years ago, when the heat riser would plug up the base of the carb would ice up. Didn't matter much on the outside temp. The exhaust ports are already there wanting to be used.

a stock vw intake is a very different animal then a stock or mod'ed flathead intake.

[tubman]

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Originally Posted by Tinker

I'd think the eddie would have better flow over the the super by just looking at it. I still run a single carb so... but I'd run a Thickstun twin.

I'm having a real tough time wrapping my head around this statement, especially after reading "Pete"'s post (#16). I would think that anyone viewing the respective manifolds would come to exactly the opposite conclusion.

[JSeery]

Originally Posted by Tinker

a stock vw intake is a very different animal then a stock or mod'ed flathead intake.

LOL, that is for sure! Was just refereeing to the lack of a heat riser leading to a very cold environment below the carb ventures. That leads to fuel wanting to pool on the sidewalls and poor engine performance. On a VW it is a very visual thing with a layer of frost around the intake below the carburetor. On a flathead manifold it is difficult to impossible to see this. Fuel does not burn well in a liquid state!

[revkev6]

I just put the rebuilt 245 in my 28 roadster and installed it with the exhaust crossovers open to heat the intake. first run on an 80 degree day the motor was boiling the fuel in the carbs. pulled the intake blocked em and it's running great. give it a few minutes to show some temp on the gauges and it runs fine.

[Flathead]

Today's gas is different also.

[Tinker]

Originally Posted by JSeery

LOL, that is for sure! Was just refereeing to the lack of a heat riser leading to a very cold environment below the carb ventures. That leads to fuel wanting to pool on the sidewalls and poor engine performance. On a VW it is a very visual thing with a layer of frost around the intake below the carburetor. On a flathead manifold it is difficult to impossible to see this. Fuel does not burn well in a liquid state!

More then half (the bottom half) of the intake on a flathead is in contact with the block. It's gets quite a bit of heat transfer.

Like I mentioned before I've run without the crossover and it ran great, started fine and never had any gas issues in hot climate (fl was an average of 60-90+ yr around). Now in Mn things don't get hot enough fast enough. So block offs are gone.

Air in the intake helps to atomize fuel. Heat helps, sometimes too much.

Just my opinion. Worth a try and easily changed.

[JSeery]

I run my manifolds with the heat risers blocked. But I would think with the high risers it might be more of an issue.

[Talkwrench]

Originally Posted by JSeery

I run my manifolds with the heat risers blocked. But I would think with the high risers it might be more of an issue.

Yes Mine wont run well until hot.. But that's on Aussie fuel ; )

[Bursonaw]

Originally Posted by Bursonaw

Thanks to everyone for there posts. Sounds to me that each has there own minor shortcomings. I did go with the Slingshot, mostly for price and that I did not need to change my generator out. Hot Rod magazine did do a nice write up on the Slingshot, but it did not talk about the drivability of the manifold.

I have not run mine on the road as of yet just a test run around the block. Once I finish rebuilding the front axle then hopefully I can put some miles on it then.




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Updating those interested.

I’ve been running with the Slingshot manifold for a couple months now. There is a noticeable increase in performance. In overdrive I can cruise on the highway at 65 - 70 mph, as with a stock manifold the car struggled at those speeds. I do have to let the car warm up for a couple minutes before I can drive the car even in hot weather. I feel the engine is still running a little rich with 50’s for jets. I was going to try 49’s or 48’s. Looking at the plugs they all look the same, but I have never been good at reading plugs, so I hope that someone can give me an education on the subject?






Regards


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